$ git clone -n https://src.fedoraproject.org/rpms/flrig.git /var/lib/mock/f40-build-1996582-44033/root/chroot_tmpdir/scmroot/flrig
Cloning into '/var/lib/mock/f40-build-1996582-44033/root/chroot_tmpdir/scmroot/flrig'...
$ git fetch origin 2947085b8a5afbcffbebcab15a5e397d8256a3e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flrig
 * [new ref]         2947085b8a5afbcffbebcab15a5e397d8256a3e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2947085 Update to 2.0.03.